Ratchet drill-stock



(No Model.)

0. H. WILMOTH.

RATCHET DRILL STOCK.

No. 365,214. Patented June 21, 1887 Luz . %avd.

UNITED STATES PATENT OFFICE.

CORYDON H. IVILMO'IH, OF TERRE HAUTE, INDIANA.

RATCHET DRILL-STOCK.

EBPECIPICATION forming part of Letters Patent No. 365,214, dated June 21, 1887.

Application filed February 28, 1887. Serial No. 219,142.

To all whom it may concern.-

Be it known that I, CORYDON H. WILMOTH, a citizen of the United States, residing at Terre Haute, in the county of Vigo and State of Indiana, have invented a new and useful Improvement in Ratchet Drill-Stocks, of which the following is a specification.

My invention relates to an improvement in ratchet drill stocks. In this class of drillstocks as heretofore constructed the drillholder is provided with a ratchet-wheel which is engaged by a pawl mount-ed on a lever, and the drill-holder is turned by the movement of the lever in one direction only.

The objects of my improvement are to cause both the forward and backward movement of the lever to rotate the drill-holder constantly in one direction, and to provide convenient means for feeding the drill to the work. 7

The accompanying drawings illustrate my invention.

Figurel is a plan. Fig. 2 is a vertical section. Fig. 3 is a partial transverse section at a, Fig. 2. Fig. 4 is a partial transverse section at I), Fig. 2.

The drill-holder consists of a short cylindrical shaft, A, having a socket,- c, to receive the drill-shank, and two ratchet-wheels, d and e, secured thereon.

B is the handle having bearingsf and g, in which shaft A revolves.

G is the operating-lever, mounted 011 the upper portion of shalt A so as to turn thereon, embracing the ratchet-wheel d and carrying the pawl h, which engages wheel cl.

D is a collar mounted on shaft A, so as to turn thereon between the bearings f and g.

E is a cog-wheel,also mounted so as to turn on the shaft, and secured to collar D so as to turn therewith. A pawl, i, pivoted to collar D, engages the ratchet-wheel e. Pivoted to handle Bis a lever, F. One end of lever F forms a cogged segment which engages wheel E, and the other end of the lever is connected with the free end of the operating-lever by a screw, j, which passes through a slot, 70, in the lever F.

H is the ordinary screw-socket for feeding the drill, the upper end of the screw I being adapted to engage the usual clamping-bar,

(No model.)

engagementwith the socket by means of a bent I lever, 0, arranged under the handle ofthe opcrating-lever.

In operation, the drill-stock carryingadrill and being clamped to the piece to be drilled by the clamping-bar engaging the upper end of the feed-screw in theusual well-known manner, the operator holds handle B in the left hand and swings the operating-handle back and forth with the right hand. \Vhen the operating-lever is swung toward the left, pawl h engages wheel d and turns the drill in the same direction in which the lever is moving. \Vhen the operating-lever is swung toward the right, lever F, moving in the same direction, turns wheel E and collar-D in the opposite direction to that in whichthe operating-lever is moving, and pawl i, engaging ratchet-wheel e, the drill is turned in the same direction. Both movements of the operating-lever thus turn the drill in the same direction. \Vhen the operator wishes to feed the drill to the work, he raises the free arm of bent lever 0 with one finger of the hand holding the operating-lever, and thereby forces clutch on into engagement with teeth Z on socket H, and the socket then turns with the lever until lever 0 is released.

I claim as my invention 1. Ina ratchet drill-stock, the combination, with the tool-holder, the ratchet-wheel d, the operating-lever, and the pawl pivoted to the lever and arranged to engage the ratchetwhecl, of the ratchet-wheel e, collar D, pawl 17, cog-wheel E, and lever F, all arranged to co-operate substantially as shown and described, for the purpose specified.

2. In a ratchet drill-stock, the combination of a shaft having a socket adapted to hold a tool, two ratchet-wheels secured to said shaft,

erating-lever,wherebythesecondratchet'wheel [o and the shaft are turned in the same direction as at first during the return movement of the operating-lever, substantially as specified.

OORYDON H. WILMOTH. \Vitnesses:

GEORGE P. SMITH, THOMAS J. .WILMoTH. 

